Acrylic Sheet Specification

Cast Acrylic Sheet Chemical Features
(Resistant Properties to Chemical Agents)

Sulfuric Acid 60°C LR
Hydrochloric Acid 60°C R
Nitric Acid 60°C N
Caustic Soda 60°C R
Aqueous Ammonia 60°C R
Acetic Acid 60°C N
Ethyl Acetate N
Toluene N
Ethylene Dichloride N
Benzene N
Methyl Alcohol N
Diemethyl Formamide N
Acetone N
Aniline N

R:  resistant; LR: limited resistant; N: not resistant.  Average Physical Properties (6 mm)

 

Properties Unit  
Specific Gravity   1.19
Hardness   M-100
Water Absorption (24hrs)   0.30%
Tensile Strength:

Tensile strength at yield

Tensile strength of break

Tensile modulus

Elongation at break

 

psi

psi
psi
%

 

10500

10500

450000

4.9

Bending Strength:
Flexural Strength
Flexural Modulus
psi

psi

 

16000

450000

Impact Strength ft-lb/in 0.3
Shear Strength psi 9000
Transmittancy:
Full rays
Parallel rays
   

93%
92%

Specific Heat J/g/°C 1.32
 Heat Distortion Temperature (4.6kg/cm)   100°C
 Coefficient of Heat Conductivity W/m. °C 0.17
 Coefficient of Linear Expansion Cm/cm/°C 6*10¯5cm/cm°C
 Ultimate Temperature of Continuous Operation   80°C
 Flammability UL94 HB
 Surface Resistivity at 28°C Ohm/cm2 2x1018
 Volume Resistivity Ohm-cm 6x1017
 Thermoforming Ranges   140-180°C
 Dielectric Strength   20Kv/Mm

Chemicals Solvent Resistance Of Cast Acrylic Sheet

Chemicals Solvents
Sulfuric acid 60% None *    No corroding/damage will occur under normal temperature:

Ethane, Octane, Petroleum, Methyl alcohol,

Ethyl alcohol.

*    Hard to be dissolved but slightly swollen or defection will occur under normal temperature:

Butanol, Propanol, Carbon tetrachloride.

*    Dissolved may occur under normal temperature:

Acrylketone, Benzene, Toluene, Ethylene Dichloride, Ethyl acetate.

 

Hydrochloric acid 30% None
Nitric acid 20% None
Acetic acid None
Hydrogen fluoride None
Caustic soda 50% None
Ammonia aqua 18% None
Ammonia aqua 28% None
Chlorine water Darkish
Iodine water Stained easily

Acrylic Sheet Special Instruction For Installation

1. Reserve enough space for acrylic sheet stretching.

The stretching degree effected by max operating/working temperature range (celsius) of cast acrylic sheet is as followed.
After finishing processed acrylic novelties at 10°C, when temperature raised to 50°C, the thermal heat expansion rate will be 1000*8*10¯5*(50-10)=3.2m/m.
After finishing processed acrylic novelties at 30°C, when temperature falls to -10°C, the contraction/shrink rate will be 1000*6*10¯5*(30+10)=2.4m/m.

Acrylic Problem Prevention

-Reserve the cast acrylic sheet frame for contractility/shrinkage
-Making the screw hole in oval shape by drilling or cutting
-Acrylic (PMMA) cutting cushion material durability should as elastic as rubber
-Thermal heat forming/molding custom cast acrylic plastic sheet into non significant shape

Using straighten or thermal heat forming way to increase the cross-sectional coefficient to avoid interior stress/friction of acrylic plastic sheet.

2. Prevent Acrylic Transformation/Reshape:

Forming plexiglass cast acrylic plastic sheets into wave shape, wrap through to increase cross sectional coefficient in order to prevent transformation/reshape from the weight of acrylic sheet itself and loading. Increase thickness of acrylic sheet when the length and the dimension becomes larger. It is necessary to calculate thickness related to fracture tension tolerance and bending yield strength of acrylic sheet on the surface that endures wind pressure.

Physics Solvent Resistance Of Cast Acrylic Sheet

Specific gravity 1.19
Hardness M-100
Absorptivity of water (24hr) 0.30%
Tension  
Coefficient of rupture 700kg/cm2
Coefficient of elasticity 28000kg/cm2
Bending 1.5
Coefficient of rupture 5kg/cm2
Coefficient of elasticity 28000kg/cm2

 

 

Transmittance (parallel rays) 92%
Full rays 93%
Heat distortion temperature 100°C
Coefficient of linear expansion 6*10¯5cm/cm°C
Ultimate temperature of continuous operation 80°C
Thermoforming range 140-180°C
Insulating Strength 20v/mm

Cast Acrylic Sheet Weather Resistance (Cold & Hot) / Color Difference (Discolor)

  • ΔE ΔH (HAZE)
  • Minor Turbidity Change
  • 0~0.5 Minimal
  • 0.5~1.5 Small
  • 1.5~3 Sensible
  • 3.0~6 Obvious
  • 6.0~12 Major
Acrylic Sheet Cold and Hot Weather, Discoloring Resistance